The end of the film takes place almost a hundred years after the opening, with Cooper 124 years old (turns out black holes are the best defence against ageing) and Murph an old woman. The final shot, however, reveals Dr. Brand on Edmund's planet looking much the same as she did throughout the film. If we're to assume this is taking place at the same time as Murph implores Cooper to go find her, then it poses a massive timeline snafu. The effects of the black hole on time dilation across the new system are unclear, but as Edmund's planet is further out than Mann's there shouldn't be that much difference in the passage of time between Earth and the new world. So after Cooper's sacrifice, time should have moved concurrently between Brand and Murph, meaning the astronaut should be in her seventies by now. There is of course the possibility for time dilation when slingshotting around the black hole to have allowed for her to age slower, as well as the added possibility that the image of Brand is just how Cooper imagines it, but as nothing's confirmed it's all theoretical. Potential Answer: It's all sneaky editing, presenting multiple timelines as happening simultaneously. Dr. Brand has probably already got a settlement set up, whether with more humans or not is, as previously discussed, unknown. What questions do you still have about Interstellar? And do you have an concrete solutions for ours? Get the discussion going in the comments below.
